问题: 一道时态填空题
She was teaching (teach) very badly,while she was sitting (sit) at the back of the room and was watching (watch) her.这里sit我认为是用 was sitting,但答案是sat. why?
解答:
Miss. White usually teaches (teacher) very well,but she didn't teach (not teach) very well yesterday.She was teaching (teach) very badly, while she was sitting (sit)at the back of the room and was watching (watch) her students.后边可能漏了students. while引导的句子不必前后用进行时.这里描述她昨天的情况,只是"坐在教室后边监视学生",还可以写成:She was teaching very badly, while she sat at the back of the room watching her students.
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